HIGH-RESOLUTION INFRARED-SPECTRUM AND STRUCTURE OF DINITROGEN SULFIDE, N2S

The infrared spectrum of the ν3 band of the transient molecule dinitrogen sulfide has been recorded at a resolution of 0.005 cm-1. Analysis of the spectrum has been carried out using an interactive Loomis-Wood fitting program and the molecular constants and center frequencies of the cold bands due to N2 32S and N2 34S and four hot bands of N2 32S have been derived. The bond lengths of dinitrogen sulfide have been determined from the ground state constants of the two sulfur isotopomers to be rNN = 113.876(19) pm and rNS = 157.751(14) pm. The resultant geometry and frequencies are compared with the results of ab initio calculations and the geometries of similar molecules. © 1990.